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https://issues.apache.org/jira/browse/CASSANDRA-16224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276889#comment-17276889
 ] 

Marcus Eriksson commented on CASSANDRA-16224:
---------------------------------------------

+1

> InvalidQueryException: Order by on unknown column From cassandra-diff
> ---------------------------------------------------------------------
>
>                 Key: CASSANDRA-16224
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16224
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tool/diff
>            Reporter: Yifan Cai
>            Assignee: Jyothsna Konisa
>            Priority: Normal
>              Labels: pull-request-available
>
> Diff job fails with the following error,
> {code:java}
>   Caused by: 
> shaded.com.datastax.driver.core.exceptions.InvalidQueryException: Order by on 
> unknown column <column_name>
>   at 
> shaded.com.datastax.driver.core.exceptions.InvalidQueryException.copy(InvalidQueryException.java:49)
>   at 
> shaded.com.datastax.driver.core.DriverThrowables.propagateCause(DriverThrowables.java:35)
>   at 
> shaded.com.datastax.driver.core.AbstractSession.prepare(AbstractSession.java:97)
>   at mme.cassandraclient.SessionWrapper.prepare(SessionWrapper.java:215)
>   at 
> org.apache.cassandra.diff.DiffCluster.getFullStatement(DiffCluster.java:272)
>   at 
> org.apache.cassandra.diff.DiffCluster.getStatementForTable(DiffCluster.java:204)
>   at org.apache.cassandra.diff.DiffCluster.keyReader(DiffCluster.java:188)
>   at 
> org.apache.cassandra.diff.DiffCluster.fetchPartitionKeys(DiffCluster.java:125)
>   at 
> org.apache.cassandra.diff.DiffCluster.lambda$getPartitionKeys$0(DiffCluster.java:114)
>   at org.apache.cassandra.diff.RetryStrategy.retry(RetryStrategy.java:21)
>   at 
> org.apache.cassandra.diff.DiffCluster.getPartitionKeys(DiffCluster.java:113)
> {code}
> The cause is that when building the select query, the ordered-by column names 
> are not quoted. The server only sees the field names in lowercase, and it is 
> unable to recognize. 
> A simple unit test to prove that the field name needs to be quoted in the 
> query builder in order to have the built query preserve the quotes. 
> {code:java}
> query = "SELECT * FROM t WHERE a='foo' ORDER BY \"bCol\" DESC;";
> select = select().from("t").where(eq("a", "foo")).orderBy(desc("\"bCol\""));
> assertEquals(select.toString(), query);
> {code}



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